In solar physics and observation, an active region is a temporary feature in the Sun's atmosphere characterized by a strong and complex magnetic field...

classes: Active region prominences, or active region filaments, form within the relatively strong magnetic fields at the centers of active regions. Active region...

An active galactic nucleus (AGN) is a compact region at the center of a galaxy that emits a significant amount of energy across the electromagnetic spectrum...

biochemistry, the active site is the region of an enzyme where substrate molecules bind and undergo a chemical reaction. The active site consists of amino...

cellular biology, active transport is the movement of molecules or ions across a cell membrane from a region of lower concentration to a region of higher...

strength of M3.4. On 12 February 2010, active region AR11046 produced an M8.3-class flare. Later in the month, active regions AR11045 and AR11046 unleashed...

emerge. Indicating intense magnetic activity, sunspots accompany other active region phenomena such as coronal loops, prominences, and reconnection events...

Saturation or Active Region Scholberg, Kate (2017-03-23). "What is the meaning of "pinch-off region"?". The "pinch-off region" (or "saturation region") refers...

and expand into the lower solar atmosphere forming active regions. At the photosphere, active region magnetic flux is often distributed in a dipole configuration...

emission of electromagnetic radiation in the Sun's atmosphere. Flares occur in active regions and are often, but not always, accompanied by coronal mass ejections...

listing active separatist movements by continent: List of active separatist movements in Africa List of active separatist movements in Asia List of active separatist...

regions: the active region, where pixel data is sent, and the control region, where synchronization signals are sent. The active region is encoded using...

is arbitrary. The two options are active high (positive logic) and active low (negative logic). Active-high and active-low states can be mixed at will:...

however does not use bulk semiconductor materials in its optically active region. Instead, it consists of a periodic series of thin layers of varying...

layer. Additionally, because VCSELs emit the beam perpendicular to the active region of the laser as opposed to parallel as with an edge emitter, tens of...

active volcanoes. Historical time (or recorded history) is another timeframe for active. The span of recorded history differs from region to region....

one). During the transition the input transistor is briefly in its active region; so it draws a large current away from the base of the output transistor...

causes a depletion region to expand in width and encroach on the channel from the sides, narrowing the channel. If the active region expands to completely...

Active duty, in contrast to reserve duty, is a full-time occupation as part of a military force. The Indian Armed Forces are considered to be one of the...

current variations. Reverse-active (or inverse-active or inverted) By reversing the biasing conditions of the forward-active region, a bipolar transistor goes...

Solar wind, the stream of particles and plasma emanating from the Sun Active region, where most solar flares and coronal mass ejections originate Hanaoka...

water is believed to have caused induced seismicity in the seismically active region, including over 20 earthquakes of greater than 5 magnitude on the Richter...

regions which are not part of active regions and coronal holes are commonly identified as the quiet Sun. The equatorial region has a faster rotation speed...

the region being underlain by relatively thin crust and having high heat flow, both of which can favor relatively high deformation rates and active faulting...

showed it still active on the far side of the Sun. On 12 April, a Coronal Mass Ejection on the far side likely erupted from the region, with helioseismic...

diode. The active region of the laser diode is in the intrinsic (I) region, and the carriers (electrons and holes) are pumped into that region from the...

The High-frequency Active Auroral Research Program (HAARP) is a University of Alaska Fairbanks program which researches the ionosphere – the highest, ionized...

semiconductor laser that uses quantum dots as the active laser medium in its light emitting region. Due to the tight confinement of charge carriers in...

region for metal–oxide–semiconductor field-effect transistors (MOSFETs) and junction-gate field-effect transistors (JFETs), and in the active region for...

also a seismically active region, with the 7.6 Mw 2009 Papua earthquakes being the most recent great earthquake to date in the region. Borneo is the third...